package com.yunfei.core.utils.ascii;

/**
 * @program: zntg_v1
 * @description:
 * @author: zhengyunfei
 * @create: 2018-05-31 17:37
 **/


/**

 * Java中将一个字符与对应Ascii码互转

 * 1 byte = 8bit 可以表示 0-127

 */

public class EncodeUtil

{
    /**
     * 中文转Unicode
     * @param gbString
     * @return
     */
    public static String UnicodeEncoding(String gbString) {   //gbString = "测试"
        char[] utfBytes = gbString.toCharArray();   //utfBytes = [测, 试]
        String unicodeBytes = "";
        for (int byteIndex = 0; byteIndex < utfBytes.length; byteIndex++) {
            String hexB = Integer.toHexString(utfBytes[byteIndex]);   //转换为16进制整型字符串
            if (hexB.length() <= 2) {
                hexB = "00" + hexB;
            }
            unicodeBytes = unicodeBytes + "\\u" + hexB;
        }
        return unicodeBytes;
    }

    /**
     * Unicode转中文
     */
    public static String decodeUnicode( String dataStr) {
        int start = 0;
        int end = 0;
        StringBuffer buffer = new StringBuffer();
        while (start > -1) {
            end = dataStr.indexOf("\\u", start + 2);
            String charStr = "";
            if (end == -1) {
                charStr = dataStr.substring(start + 2, dataStr.length());
            } else {
                charStr = dataStr.substring(start + 2, end);
            }
            char letter = (char) Integer.parseInt(charStr, 16); // 16进制parse整形字符串。
            buffer.append(new Character(letter).toString());
            start = end;
        }
        return buffer.toString();
    }



    public static void main(String[] args)  {

        String s = "新客户注册提醒";
        String ss = EncodeUtil.UnicodeEncoding(s);
        String o=EncodeUtil.decodeUnicode(ss);
        System.out.println(ss);  //Ox6728
        System.out.println(o);  //Ox6728


    }


}